Surprisingly, Internet Explorer (which due to it's browser dominance will be the main, but not sole, purveyor of the images I create) loads this image up in a few seconds and allows the user to scroll along it very nicely. The image is really for demonstration purposes only, and many people who use the package I am writing (if there are any) will create much smaller images of the object in question. However, I like the fact that R can draw a whole genome in about 10 seconds, don't you? ;-)
Mick -----Original Message----- From: Prof Brian Ripley [mailto:[EMAIL PROTECTED] Sent: Mon 12/20/2004 5:37 PM To: Uwe Ligges Cc: michael watson (IAH-C); [EMAIL PROTECTED] Subject: Re: [R] Memory problem with jpeg() and wide jpegs It is also several times greater than the limit of human perception, being several feet long at printing resolutions that need a magnifying glass to see. This is Windows and the limit is in the graphics card: mine is able to do this but I suspect you need a 128Mb card (that jpeg is of itself about 90Mb). However, most viewers (including PhotoShop) will barf on such a large jpeg. On Mon, 20 Dec 2004, Uwe Ligges wrote: > michael watson (IAH-C) wrote: > >> Hi >> >> I have been creating very, very long jpeg images for the last two weeks >> using jpeg(). All of a sudden, and I mean that, it's stopped working - >> I've not changed a thing! The error message I get is: >> >> >>> jpeg("out.jpg",width=50000,height=480, quality=100) >> >> Error in devga(paste("jpeg:", quality, ":", filename, sep = ""), width, >> : unable to start device devga >> In addition: Warning message: Unable to allocate bitmap >> I have plenty of disk space in the place I want to create the jpeg, and >> if I reduce it from "width=50000" to "width=5000", then it works no >> problem, which suggests it is a memory problem. If I close R and >> re-open R the problem does not go away. And as I said above, I have >> been using this code for weeks with no problem, then I change nothing, >> and start getting this error message. > > I don't believe it has worked. Such a huge one does not work for me even on a > rather big machine. > If it had worked: On the same platform, OS, R version? > I think you have to contribute a patch in order to get such a huge jpeg. > > Uwe Ligges > > >> I'm running R 2.0.1 on Windows XP. I'm going to restart Windows and see >> if that helps, but if re-starting windows does help, is there an >> explanation as to where all the memory R used to be able to get at >> disappeared to in the current session? >> >> Cheers >> Mick >> >> ______________________________________________ >> [EMAIL PROTECTED] mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide! >> http://www.R-project.org/posting-guide.html > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
